Results Aberrant crypt foci (ACF) and aberrant crypt (AC) were showed in the colon mucosa of rats that received two weekly i.p. injections of AOM by light microscopy with methylene blue staining.

• 结果 亚甲基蓝染色光镜下观察，可见AOM腹腔注射的大鼠结肠黏膜出现异常隐窝（AC）和异常隐窝灶（ACF）。